Stoker.



W. H. H. STINBMAN.'

STOKBR. APPLIOAMOH PILED 8BPT.8,1910.

984.31 6'. Patented Feb. 14, 1911.

2 BHEBTS-BHEBT 1.

W. H. H. STINEMAN.

STOKER. APPLIOATION FILED SEPT. 8,1910. I 984,:31 6. I Patented Feb. 14,1911.

2 SHEBTB-EHEBT 2.

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- to provide 'uniform outlet to the fire box providcdi i is a plan viewof 1. Fig. t is a vertical -To all whom tt 'ma/y coaccm:

c the fire' box under the fire Fig. 5 is an end view.

'UNITED STATES PATENT OFFICE.

WIIaIIAM H. H, STINEMAN, OF BALTIMORE, MARYLAND, ASSIGNOM OF ONE-FOURTHTO ARTI-!UR WEGEFARTH, OF BALTIMORE, MARYLAND.

Patcnted Feb. 14, 1911.

Application filed September 8, 1910. Serial No. 581,014.

!This magazine 1 is made of two sections bolted together at The uppersection is provided with a uniform opening 4 and a channel 5 extcndingaround the upper edge of said opening and into which the fire bricks Gare fitted. The grate 7 has its npper surface lush with the uppersurface' of th channel 5. It will be seen that by having the channel 5around the edge of the opening 4 it is not necessary to fasten the lirebi'lttls t' in place and they can readily be removed and new onesinserted when desired.

The conveyer 8 has its front end journaled in the front of the hopper 9and is straight,

Be it known that I, WILLIAM H. l-l. STINE- MAN, a citizen of the UnitedStates, residing y at Baltimore, in the State of Maryland, have inventedcertain new and useful Improvements in Stokers, of which the followingis a. specification.

My'nvention relates to improvcnents in furnaces and especially to thatclass in which the eoal or other fuel is fed froni the bottom of thefurnace to the under side of the fire. In this class of devices' thegreatest efliciency and extent of fire surface are obtaned, by providinga graduated fuel conveyer, by means of which. a portion of the oruniform in size, back to the inner surface fuel will be forced out ofthe magazine of the front wall of the furnace, at which point it beginsto taper to the rear end thereof, resting in, and confor'ning to, thecone shape of the magazine l'. The shaft of the conveyer, as well as theconveyer itself, is hollow which allows the air to pass into themagazine 1.

At the front of the ma a hopper 0 communicating therewith, and i havi ganeck 11 into which the front end of i the conveyer extends, the saidhopper being slightly tapered or tlared at its mouth. The convcyer 8point adjacent the inner surface of the front wall of the furace to therear end, thus rcducing its carrying capacity toward the rear of thefire box, which Wlll cause the fuel to i be forced up through theopening 4 over the' l fire bricks (i as it is carried along the saidmagazine, thercby producing a nniforn (listrihntion of the fuel over thegrate 7 throughout the entire length of the fire-box. The/lire rcstingover the opening 4 of the magazine l will keep the lattcr constantlyfilled and cause the convcyer to feed the fuel through the opening tunifornly throughout its entire length. 4

Tt is found froni experience that the greatest heat exists at a points'rrounding the 'pening of the magazine to lhe fire-box, frequentlycausing the burning out of the grate bars at this point. 'l`o obviatcthis ohjection T provide a channel 5 around the throughout its entirelength, so that an equal distribution of the fuel to the fire will heaccomplished. By graduating the feed de- Vice along the length of thefire box in the direction of the feed, the fuel will be distributed anddeposited along the length of in even quantities to maintain a uniformsupply throughout the area thereof. p

The object of my invention is to provide a graduated conveyer to reducethe carrying Capacity thereof toward the rear of the fire box, whereby auniform distribution of the fuel in the fire-box will be maintained. And

a graduated magazine having a around the edge with fire-brick.

My invention consists of the novel construction and arrangement of theparts and combination of parts hereinafter more fully set forth in thefollowing speeification and pointed out in detail in the claims.

In the accompanying draWings--Figure 1 is a side elevation ofa fire-box,showing iny invention applied thereto. Fig, 2 is a vertical longitudinalsection of Fig. 1. Fig. 3

seetional View on the line m-w of Fig. i.

Referring to the accompanying (lrawi'ngs, forming part of thisspecification. and in which like reference numerals designate like parts'throughout the several views ther-cof, pening 4 from the magazine intowhich are 1 designates a eylindrical conc-shaped nagatitled the firebricks (i and project lightl zine projecting through the front wall of labove the grate. thus causing th` coal to roll the furnace, andsupported at its rear and l over these l'rivks before entering onto theby the supports 2 which latter have one end 1 grate. bolted to themagazine and the other end i n tlehottom of the ncck 11 of the 'hopperprojecting into the rear wall of the furnace. l is a door 12 hingcd atone 'side and held up 'azine 1 is arranged.

in position by a pin 13. This door 12 may be opened to remove any hardor lumpy object from the hopper, or for the purpose of em tying themagazine, in which latter event the rotation of the conveyer is simplyreversed which will cause the coal to be carried back to the hopper andout of the oted to-a lug 19 on th'e' side of .the hopper and its frontend projecting through an opening 20 into the neck of the hopper. Aneccentric 21 conneets the said plunger with the gear wheel 15 and as thelatter rotates it operatesth front end of saidiplunger in:

and out'of the-opening. 20 between the flights of the conveyer. Thisplunger operates to prevent'any hard or lumpy object from re- 'ma iningin or. choking the conveyer as it' ro- The plunger 18 also acts as a'cut-off tates. to hold the coal so that the conveyer will force' italong in the nagazne a-d assure.

a co'ntinuous feeding ofthe same.

By feeding the fuel tQ-the fire box from under the fire in the niannershown and des'cri'bed,no smoke will escape' froni the furnace as allgases `will be consuued and a more perfect conbustion produced,resulting in a great saving of fuel, and eeonony n oneraton.

'Having thus described n y .nvention, what I claim is:

1. In an underfeed furnace, the combination of a fire-box provided witha fuel sup'- port, a substantially horizontal magazine within said firebox having at its top a uniform opening extending substantially from endto end thereof, fire bricks supported at the sides of said opening andextending above the same, a screw conveyer within said magazine,.theupper surface of said conveyer being below said opening and a plnnger atthe forward end'of said conveyer novable into and out of operativeposition with respect to the space between the flights .thereof.

2( In an nnderfeed furnace, the combination of a fire-box provided witha fuel support, a substantially horizontal magazine within said fire-boxhaving at its top a uniform. opening extending substantially from end toend there'of and a channel at the upper edge ofisaid opening fire brickssupported in said channel and extending above said opening, a screwconveyer within said magazine, the pper surface of said conveyer beingbelow said opening, and a plun ger at the forward end of said conveyernovable into and out of operative position with respect to the spacebetween the flights thereof. i I

In testinony whereof Iafiix my signature in presence of two witnesses.

lVILLIAM H. H. STINEMAN.

lVitnesses CHAPIN A. FERGUSON, ROBERT'C. RHoDEs.

